<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>权限管理</el-breadcrumb-item>
			<el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮区域 -->
			<el-row>
				<el-col>
					<el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
				</el-col>
			</el-row>

			<!-- 角色列表区域 -->
			<el-table :data="rolelist" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter', 'xcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<!-- 通过 for 循环 嵌套渲染二级权限 -->
								<el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
									<el-col :span="6">
										<el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
											{{ item3.authName }}
										</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
						<!-- <pre>
							{{ scope.row }}
						</pre
						> -->
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleName"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
						<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
						<el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>

		<!-- 添加角色的对话框 -->
		<el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
			<!-- 内容主体区域 -->
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px" class="demo-ruleForm">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="addForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="addForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<!-- 底部区域 -->
			<span slot="footer" class="dialog-footer">
				<el-button @click="addDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="addRole">确 定</el-button>
			</span>
		</el-dialog>

		<!-- 修改角色的对话框 -->
		<el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
			<el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
				<el-form-item label="角色名称" prop="roleName">
					<el-input v-model="editForm.roleName"></el-input>
				</el-form-item>
				<el-form-item label="角色描述" prop="roleDesc">
					<el-input v-model="editForm.roleDesc"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer" class="dialog-footer">
				<el-button @click="editDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="editRoleInfo">确 定</el-button>
			</span>
		</el-dialog>

		<!-- 分配权限的对话框 -->
		<el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
			<!-- 树形控件 -->
			<el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
			<span slot="footer" class="dialog-footer">
				<el-button @click="setRightDialogVisible = false">取 消</el-button>
				<el-button type="primary" @click="allotRights">确 定</el-button>
			</span>
		</el-dialog>
	</div>
</template>

<script>
export default {
	data() {
		return {
			// 所有角色列表数据
			rolelist: [],
			// 控制添加角色对话框的显示与隐藏
			addDialogVisible: false,
			// 添加角色的表单数据
			addForm: {
				roleName: '',
				roleDesc: ''
			},
			// 添加表单的验证规则对象
			addFormRules: {
				roleName: [
					{ required: true, message: '请输入角色名称', trigger: 'blur' },
					{ min: 1, max: 10, message: '角色名称长度在1~10个字符之间', trigger: 'blur' }
				],
				roleDesc: [
					{ required: false, message: '请输入角色描述', trigger: 'blur' },
					{ min: 1, max: 10, message: '角色名称长度在1~10个字符之间', trigger: 'blur' }
				]
			},
			// 控制修改角色对话框的显示与隐藏
			editDialogVisible: false,
			// 查询到的角色信息对象
			editForm: {},
			// 修改表单的验证规则对象
			editFormRules: {
				roleName: [
					{ required: true, message: '请输入角色名称', trigger: 'blur' },
					{ min: 1, max: 10, message: '角色名称长度在1~10个字符之间', trigger: 'blur' }
				],
				roleDesc: [
					{ required: false, message: '请输入角色描述', trigger: 'blur' },
					{ min: 1, max: 10, message: '角色名称长度在1~10个字符之间', trigger: 'blur' }
				]
			},
			// 控制分配权限对话框的显示与隐藏
			setRightDialogVisible: false,
			// 所有权限的数据
			rightslist: [],
			// 树形控件的属性绑定对象
			treeProps: {
				label: 'authName',
				children: 'children'
			},
			// 默认选中的节点Id值数组
			defKeys: [],
			// 当前即将分配权限的角色id
			roleId: ''
		}
	},
	created() {
		this.getRolesList()
	},
	methods: {
		// 获取所有角色的列表
		async getRolesList() {
			const { data: res } = await this.$http.get('roles')

			if (res.meta.status !== 200) {
				return this.$message.error('获取角色列表失败! ')
			}

			this.rolelist = res.data
			// console.log(this.rolelist)
		},
		// 监听添加角色对话框的关闭事件
		addDialogClosed() {
			this.$refs.addFormRef.resetFields()
		},
		// 点击按钮，添加新角色
		addRole() {
			this.$refs.addFormRef.validate(async valid => {
				if (!valid) return
				// 可以发起添加角色的网络请求
				const { data: res } = await this.$http.post('roles', this.addForm)

				if (res.meta.status !== 201) {
					this.$message.error('添加用户失败!')
				}
				this.$message.success('添加用户成功!')
				// 隐藏添加用户的对话框
				this.addDialogVisible = false
				// 重新获取用户列表数据
				this.getRolesList()
			})
		},
		// 展示编辑角色的对话框
		async showEditDialog(id) {
			// console.log(id)
			const { data: res } = await this.$http.get('roles/' + id)

			if (res.meta.status !== 200) {
				return this.$message.error('查询用户信息失败! ')
			}
			this.editForm = res.data
			this.editDialogVisible = true
		},
		// 监听修改角色对话框的关闭事件
		editDialogClosed() {
			this.$refs.editFormRef.resetFields()
		},
		// 修改角色信息并提交
		editRoleInfo() {
			this.$refs.editFormRef.validate(async valid => {
				// console.log(res)
				if (!valid) return
				// 发起修改角色信息的请求
				const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
					roleName: this.editForm.roleName,
					roleDesc: this.editForm.roleDesc
				})
				if (res.meta.status !== 200) {
					return this.$message.error('在更新角色信息失败! ')
				}

				// 关闭对话框
				this.editDialogVisible = false
				// 刷新数据列表
				this.getRolesList()
				// 提示修改成功
				this.$message.success('更新角色信息成功! ')
			})
		},
		// 根据id删除对应的用户信息
		async removeRoleById(id) {
			// 弹框询问用户是否删除数据
			const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
				confirmButtonText: '确定',
				cancelButtonText: '取消',
				type: 'warning'
			}).catch(err => err)
			// 如果用户确认删除，则返回值为字符串 confirm
			// 如果用户取消删除，则返回值为字符串 cancel
			// console.log(confirmResult)
			if (confirmResult !== 'confirm') {
				return this.$message.info('已取消删除')
			}

			const { data: res } = await this.$http.delete('roles/' + id)
			if (res.meta.status !== 200) {
				return this.$message.error('删除角色失败! ')
			}

			this.$message.success('删除用户成功! ')
			this.getRolesList()
		},
		// 根据id删除对应的权限
		async removeRightById(role, rightId) {
			// 弹框提示用户是否要删除
			const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
				confirmButtonText: '确定',
				cancelButtonText: '取消',
				type: 'warning'
			}).catch(err => err)

			if (confirmResult !== 'confirm') {
				return this.$message.info('取消了删除! ')
			}

			const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

			if (res.meta.status !== 200) {
				return this.$message.error('删除权限失败! ')
			}

			// this.getRolesList()
			role.children = res.data
		},
		// 展示分配权限的对话框
		async showSetRightDialog(role) {
			this.roleId = role.id
			// 获取所有权限的数据
			const { data: res } = await this.$http.get('rights/tree')

			if (res.meta.status !== 200) {
				return this.$message.error('获取权限数据失败! ')
			}

			// 把获取到的权限数据保存到 data 中
			this.rightslist = res.data
			console.log(this.rightslist)

			// 递归获取三级节点的Id
			this.getLeafKeys(role, this.defKeys)

			this.setRightDialogVisible = true
		},
		// 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
		getLeafKeys(node, arr) {
			if (!node.children) {
				return arr.push(node.id)
			}

			node.children.forEach(item => this.getLeafKeys(item, arr))
		},
		// 监听分配权限对话框的关闭事件
		setRightDialogClosed() {
			this.defKeys = []
		},
		// 点击为角色分配权限
		async allotRights() {
			const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]

			const idStr = keys.join(',')

			const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })

			if (res.meta.status !== 200) {
				return this.$message.error('分配权限失败! ')
			}

			this.$message.success('分配权限成功! ')
			this.getRolesList()
			this.setRightDialogVisible = false
		}
	}
}
</script>

<style lang="less" scoped>
.el-tag {
	margin: 7px;
}

.bdtop {
	border-top: 1px solid #eee;
}

.bdbottom {
	border-bottom: 1px solid #eee;
}

.xcenter {
	margin: 0 48px;
}

.vcenter {
	display: flex;
	align-items: center;
}
</style>
